FRS-20  Air inlet cotton

   ·Washable and reusable

   ·Low resistance

   ·Excellent flame retardant

   ·Flexible

   ·Economical and practical

Application:  ≥5μm , Filter dust ,  (especial used in the train or the subway, where the place has air-conditioning), pre-filter through  air filter program

Type: supply slices or rolls size

Media: synthetic fiber with gradual density,

Washable: about 2-3 times

EN779 class: G2

Average arrestance:75%（ASHRAE52.1-1992）

EUROVENT4/5 class: EU2

DIN53438  Non-flammability Standard: F1

Final resistance:  (s est) 100Pa-(max)200Pa

Max. Dust holding capacity: 430g/㎡

Temp. resistance: 100℃